Control, operation

–cannot be switched off –can only be overridden for short periods of time

Danger!

The electronic stick cylinder shut-down function is not a safety device in the narrow sense of the word and serves only as an operating aid for the machine operator!

Please note that the machine operator is responsible for the correct adjustment of the relevant settings!

Danger!

Even with the stick cylinder shut-down function, there remains a risk of damage to the operator's cab and objects in the vicinity of the machine. The machine might vibrate or swing! Risk of accident!

Possible causes:

–Oscillation of the working tool such as a grapple swinging from its stick, or where the size of a working tool is considerably increased when it is opened.

–Delayed shut-down. The shut-down travel might be extended by up to 0.5 m, depending on the oil temperature and the type of attachment. Under certain conditions, it might even be extended by up to 1.0 m (depending on the retracting speed and the grapple content).

–Jerking shut-down.

Adjust the stick cylinder shut-down function in such a way that there is a sufficient safety distance, even if the working tool is oscillating or if shut-down is delayed.

Avoid fast movements of the stick when it is operated near the shut-off points.

The following operating statuses are indicated on the display:

DisplayOperating status

Shut-off point reached when stick is being retracted.

Shut-off point overridden during stick retraction.

Shut-off point for stick extension reached*).

Shut-off point overridden during stick extension*).

3.4.19.3Overriding stick cylinder shut-down function

Danger!

Risk of injury and damage to equipment!

While the stick cylinder shut-down function is overridden, there is a risk that the attachment might collide with the operator's cab.

When overriding the stick cylinder shut-down function, operate the machine with extreme caution.

After the stick shut-down function has stopped the movement of the stick:

The stick cylinder shut-down function can be overridden by pressing the switch S216

Press the switch S216

The indicator light in the switch is on. The stick cylinder shut-down function is overridden. The buzzer (warning signal) sounds.

For the next 10 seconds, the stick can be moved across the limits of the shutdown function.

Display:

Carefully move the stick beyond the shut-off point into the danger range. The buzzer is automatically switched off as soon as the stick is again within the permissible working range.

The stick cylinder shut-down function is automatically reactivated after 10 seconds. Press the switch S216 again, –if the attachment is moved back to the permissible operating range –after a 10-second period has lapsed

3.4.19.4Adjusting stick cylinder shut-down function

Move the attachment (boom) to its highest position.

Carefully retract the stick with the respective attachment (e.g. grapple) to the desired position.

Fig. 3-83 Setting shut-off point

Loosen the screws a Move the limit switch d at the elongated hole until the outer edge 3 of the boom intersects the voltage field of the limit switch. Tighten the screws a again. Test the stick cylinder shut-down function.

3.5Installation and removal of attachment parts

3.5.1Safety Instructions

3.5.1.1Installation and removal of attachment parts

–Equipment and attachment parts made by other manufacturers or those which do not have LIEBHERR’s general approval for installation may not be installed on the machine without prior written approval by LIEBHERR.

LIEBHERR must be provided with the required technical documentation necessary for this purpose.

–Set the machine on alevel and stable ground prior to any work with attachments.

–Lock the uppercarriage with the locking pin to the undercarriage.

–Do not position yourself under a raised attachment that has not been adequately and securely supported.

–Never place yourself under a machine while it is elevated.

–Remove hydraulic system pressure before working on any attachments (as described in this operating manual).

–Do not attempt to lift heavy parts. Use suitable lifting devices with sufficient load carrying capacity.

–Insure any lifting system or lifting device that is used is in good repair and adequately rated for the component or machine to be supported. Always wear work gloves when handling wire cables.

–When working on the equipment: Switch off the diesel engine, remove the key and turn the safety lever upward.

–During repairs: Make sure that the hydraulic lines are properly attached and that all fittings and connections are properly tightened.

–As soon as an attachment part is removed and supported, cover or cap the openings in the hydraulic circuit to prevent dirt infiltration. Permit only authorized persons near the machine or the lifting device.

3.5.1.2Removal and installation of attachment pins

–Never use your fingers to align pin bores. If possible, always use a hydraulic pin pulling device to push out the pins on the attachment.

–If pins must be removed with a sledge hammer, use a punch and a guide tube held by another person.

–To drive out a pin, install the impact screw from the tool box in the threaded bore of the pin and hit the screw only.

–For the installation of a pin retained with castle nut and cotter pin, drive the pin in first to the stop, then install the castle nut by hand until contact and tighten it only to the point where the cotter pin can be installed.

3.5.2Installation and removal of digging tool

Fig. 3-84 Installation and removal of digging tools

The following is a description of the installation and removal of digging tools. Digging tools include backhoe bucket, ditch cleaning buckets or ripper.

Installation and removal of attachment parts

3.5.2.1Removing the digging tool

Position the attachment in such a way that the entire bottom part of the digging tool is laying on the ground.

Unscrew the locking plate 5 and remove the locking plate 6 and knock out pin 3 and pin 4.

If necessary, raise the attachment slightly when knocking out pin 4 to relieve it.

3.5.2.2Installing a new digging tool

Position the digging tool to be installed in such a way that its entire flat bottom is laying on the ground.

Start the engine and move the attachment until the bucket stick bearing and the bearing points 1 of the digging tool are aligned.

Guide in pin 4 and secure it with plate 6

Extend the bucket cylinder slowly until the bore hole in the connecting link 7 is located precisely between the bearing points 2

Guide in pin 3 and secure it with plate 5

Grease all lube points on pins 3 and 4 until clean grease emerges on the corresponding bearing points.

3.5.2.3Bucket cylinder operation

Two hydraulic lines on the stick are used either for bucket cylinder operation or grapple operation.

The lines are switchable via a valve block 15:

– a - Bucket cylinder operation (for digging tools)

– b - Grapple operation (for grapple, scrap cutter etc.)

Turn the both square head bolts on valve block 15 in such a way that the markings are positioned transverse to the travel direction (position a, bucket cylinder operation).

Note!

If the machine is equipped with a hydraulic quick change adapter and LIKUFIX, it is not necessary to switch between bucket cylinder operation and grapple operation. There is no valve block 15

3.5.3Attachment of grapple to bucket stick

Danger! Risk of injury

Ensure that the machine operator follows the instructions of the instructor when moving the equipment.

Two workers are required to attach or remove the grapple.

3.5.3.1Attaching grapple

Before attaching a clamshell grab or multiple grab, ensure that the necessary hydraulic lines for grapple operation are mounted to the bucket stick. The grapple must be in a stable position (grabs fully opened).

If necessary, dismantle the digging bucket.

Move the attachment in order to position the bucket stick between the bearing points of the grapple suspension 1

Insert the bolts 2 and secure them with the plate 3